Wheel dressing device



Oct. 29, 1935. A. P. STEINER WHEEL DRESSING DEVICE Original Filed Dec.22, 1928 ML 1412104? gzemel Patented Oct. 29, 1935 UNITED STATES PATENTOFFICE WHEEL DRESSING DEVICE Original application December 22, 1928,Serial No. 327,903. Divided and this application April 20,

1932, Serial No. 606,470

8 Claims.

This invention relates to wheel dressing means for a grinding wheel andis particularly designed with a view to its use on a grinding wheel ofthe character required for grinding both the face and hub of a gear.

A general object is to effect improvements in the construction and meansfor operating wheel dressing apparatus.

A more specific object is to provide a wheel dressing device which maybemoved to dress the grinding wheel without traversing the carriage uponwhich the work is mounted. This application is a division of mycopending application Serial No. 327,903, filed December 22, 1928 forGrinding machines.

Referring to the accompanying drawing, which is made a part hereof andon which similar reference characters indicate similar parts,

Figure 1 is a plan view of the device,

Figure 2, a section on line 2,2 of Figure 1, and

Figure 3, an end elevation of the device.

The wheel dressing device forming the subject matter of this applicationis designed to be mounted on the work carriage of a grinding machine. Asshown a base In is suitably secured upon the work carriage of themachine, and a casting H is mounted upon and secured to the base Ill.The casting H has a depending portion l2 which fits in a correspondingsocket in the base I. This permits the casting to be rotated in ahorizontal plane to position dressing tools in correct relation with thework. In the casting II is provided a cylindrical chamber I3. A pistonl4 operates in this chamber, the piston having a piston rod IE to whichis secured a holder I 6 which telescopes over a cylinder head or coverH. A key [8 in the holder fits in a key way IS in the cover to preventrotation of the holder. The holder It carries wheel dressing elements 20and 2| on opposite sides. The piston I4 is operated by pressure fluidcontrolled by means of a valve shown as a whole at 22. At 23 is an inletport which port is in communication with a suitable source of fluidunder pressure. After passing through the cylinder l3 fluid is exhaustedthrough port 24 to any suitable exhaust line. The valve proper consistsof a valve stem 25 having a knurled knob 26 for operating it. Thecylinder I3 is provided with ports 21 and 28 through which pressurefluid passes into the cylinder for operating the piston I4. The castingII carries a lever or bracket 29 by means of which it is rotated in ahorizontal plane.

On the base In is a standard 30 through which is threaded an adjustablestop screw 3|, the screw being locked in adjusted position by a nut 32.On the casting H is a fixed stop 33 which engages the adjustable stop 3|to stop the casting in correct position to place the dressing tool 5against the face of the wheel to be dressed.

The operation of the device is as follows: The casting 58 is locked inposition by means of a bolt 34 which is operated by means of a handle35. To dress one face of a grinding wheel the holder Hi 10 is moved bypressure fluid to the positions shown in Figure 1 in which position thediamond element 20 is in its forward position and is adjacent the sideface of a grinding wheel 36 as shown in Figure 1. .Vhen this. face ofthe grinding 15 wheel has been properly dressed the valve stem 25 ismanipulated so as to move the piston M to the rear. This withdraws theholding element It so that it may be swung around until the stop 33engages the adjustable screw 3| as shown in 20 dotted line position inFigure 1. The valve 25 is again operated to admit pressure fluid to therear of piston Hi to move it forward to position the diamond 2| in thedotted position shown at 3'! where it may engage the surface of thegrinding 25 wheel which is at right angles to. the surface against whichthe diamond 2.0, is positioned as shown in Figure 1. The dressing toolis now in position to dress another face of the grinding wheel whichface is at right angles to the one 30 previously dressed.

The movements just described may all be carried out without moving thework carriage. This simplifies operation and insures a more accuratedressing of the grinding surfaces on the grinding 35 wheel.

It will be obvious to those skilled in the art that various changes maybe made in my device without departing from the spirit of the inventionand. therefore I do not limit myself to what is 40 shown in the drawingand described in the specification, but only as indicated by theappended claims.

Having thus fully described my said invention, what I claim as new anddesire to secure by Let- 45 ters Patent, is:

1. A wheel dressing tool of the kind described comprising a bracket, asupport for the bracket said bracket being movable in a horizontal planeon the support, means for limiting movement of 50 the bracket within apredetermined range, an element mounted on the bracket and movable in a'plane parallel with the plane of movement of the bracket, said elementhaving a pair of wheel dressing tools mounted therein, the tools serving55 plane, means on the base for limiting such movable bracket to an arccorresponding to the angle made by the'faces on the wheel, a tool holdermounted on the bracket, hydraulic means for moving said tool holder inthe plane of movement of the bracket, a pair of tools mounted in theholder, said tools being swingable to dress I the face of an abrasivewheel and a side of the abrasive wheel which is at right angles to thesaid face, substantially as set forth.

3. Means for dressing the cutting surfaces of an abrasive wheel havingtwo surfaces at an angle to each other comprising a tool holder havingapair of wheel dressing tools mounted therein, said holder being pivotedand manually movable about said pivot in a horizontal plane and havinghydraulic means for moving it in the same plane but radially of thepivot point to position each of the wheel dressing tools consecutivelyto dress first one face of the abrasive wheel and then the other,substantially as set forth.

4. In a grinding machine of the kind described the combination with awork carriage of a base removably secured on the carriage, a bracketmounted upon the base and movable in a horizontal plane, a. holdermounted on the bracket, said holder carrying a pair of wheel dressingtools, said holder being movable axially to position one of the dressingtools in contact with a face of a grinding wheel to be dressed andswingable in a horizontal plane to position the otherdressing toolagainst an adjacent face of the grinding wheel which face is at an angleto the first named face, and adjustable stops for securing the dressingtools in correct position when moved to wheel dressing position,substantially as set forth.

5. A wheel truing fixture for angular faced wheels comprising apivotally mounted tool hold. er, a tool head slidably mounted in saidholder, dressing tools on opposite sides of said head,

means to traverse the tool to dress one face of 5 forth.

6. A wheel truing fixture comprising a base, a support pivotally mountedin said base, a tool head mounted on said support and reciprocablerelative thereto, a pair of dressing tools mounted at diametricallyopposed points on said head, and adjustable stops on said base portionto determine the angle and position of said angle through which saidsupport willmove, substantially as set forth. '7. A wheel truing devicefor dressing a wheel havingtwo faces each at an acute angle to the planeof the wheel comprising a pivotally mounted support, a tool head mountedon said support and reciprocable relative thereto, means on said head todress said wheel, means to traverse the tool to dress one face of thewheel, and means to swing said support through an angle equal to theangle between the faces to position the head to dress the second face. I8. A tool for dressing the faces of a grinding wheel which faces are atan angle to each other comprising a base, means for securing the base ina fixed position, a bracket mounted upon the base, means for moving thebracket in a. horizontal plane, means on the bracket for limiting suchmovement to an arc corresponding to the angle made by the faces on thewheel, a tool holder mounted on the bracket, pressure fluid means formoving said tool holder in the plane of move- 40,

ment of the bracket, a wheel dressing tool mounted in the holder, saidholder being swingable to dress a face of the grinding wheel and anotherface of the wheel which is at an angle to the said first face.

AMOS P. STEINER.

